To install it from Downloads folder you have to permit app installation from the unknown sources under the developer menu.

The app will be uploaded to the Play Store within next week.

Hey.
Now we have an Android demo app. Since it is not at the Play store yet, download it here: https://blackb.one/BlackBoneDemo.apk
To install it from Downloads folder you have to permit app installation from the unknown sources under the developer menu.
The app will be uploaded to the Play Store within next week.